The reckoning, by Alma Katsu, (sound recording)

Lanore McIlvrae is willing to do whatever it takes to secure a future with her beloved, Luke Findley. But centuries before, Lanore attained immortality with the help of Adair, a monster hiding behind a handsome facade. And now Adair is back, unwilling to ever let Lanore go

Lanore McIlvrae is willing to do whatever it takes to secure a future with her beloved, Luke Findley. But centuries before, Lanore attained immortality with the help of Adair, a monster hiding behind a handsome facade. And now Adair is back, unwilling to ever let Lanore go